This threaded adapter is designed to couple a standard 1/8 in. NPTM pipe thread to the Schrader port on your fuel rail. The standard Schrader port has a flare style sealing surface where the pipe thread uses a tapered thread to seal the connection. With this adapter, you can attach a fuel pressure gage, fuel pressure sending unit, or flex hose as long as the item you are attaching has a male 1/8 pipe thread.
